Electronic Principles
Which one of the following phrases most accurately describes a purely capacitive circuit?

Resistances provide the only opposition to current flow
Combinations of resistance and capacitive reactance provide any opposition to current flow
None of these
Capacitive reactance provides the only opposition to current flow
The ac voltage leads the current by 90 degree

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Electronic Principles
Which one of the following statements most accurately reflects the nature of ac power?

The current in an ac circuit changes direction periodically
The current in an ac circuit flows in one direction, but changes value periodically
The current in an ac circuit flows in two directions at the same time
The current in an ac circuit flows in one direction at a steady level
None of these

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Electronic Principles
Which one of the following statements is true for the voltage in a parallel RL circuit?

The voltage always has the same amplitude and phase for every part of the circuit
None of these
The total voltage lags the total current by less than 90
The total voltages is less than the sum of the voltages across the resistance and inductance
The total voltage is equal to the sum of the voltages across the resistance and inductance

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Electronic Principles
The total inductance of a series inductor circuit is:

None of these
equal to the source voltage divided by total current
less than the value of the smallest inductor
equal to the sum of the individual inductance values
equal to the sum of the individual inductive-reactance values

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